text: <script type="text/javascript">
  $(document).ready(function() {
    $('#ctl00_cphMainContent_btnRegister').hide();
    $('#ctl00_cphMainContent_ucUserRegistration_txtEmail').focusout(function() {
      $('#ctl00_cphMainContent_ucUserRegistration_txtEmail').filter(function() {
        var user_email=$('#ctl00_cphMainContent_ucUserRegistration_txtEmail').val();
        var emailReg = /^([a-zA-Z0-9\._-])*@anz.com+$/; //CHANGE @anz.com TO BE THE REQUIRED EMAIL DOMAIN
        if(!emailReg.test(user_email)) {
          alert('Please enter a valid ANZ email address'); //CHANGE ANZ TO BE THE NECESSARY COMPANY NAME
          $('#ctl00_cphMainContent_btnRegister').hide();
        } else {
          $('#ctl00_cphMainContent_btnRegister').show();
        }
      })
    });
  });
  </script>
  